Nyx is a terminal status monitor for Tor,
intended for command-line aficionados and ssh connections. This functions
much like top does for system usage, providing real time information on
Tor's resource utilization and state.

Pluggable Transports (PT) transform the Tor traffic flow between the client
and the bridge. This way, censors who monitor traffic between the
client and the bridge will see innocent-looking transformed traffic
instead of the actual Tor traffic.

In collaboration with The
Guardian Project, we're developing Tor on the Google Android mobile
operating system. A related application is Orlib; a library for
use by any Android application to route Internet traffic through
Orbot/Tor.

Shadow is a discrete-event network simulator that runs the real
Tor software as a plug-in. Shadow is open-source software that enables
accurate, efficient, controlled, and repeatable Tor experimentation.

The Open Observatory of Network Interference, is a global observation
network which aims is to collect high quality data using open methodologies,
using Free and Open Source Software (FL/OSS) to share observations and data
about the various types, methods, and amounts of network tampering in the
world.